Running Kotlin REPL for a specific kt_jvm_library target

[tandel-pratik]

REPLs are very useful to be able to load specific classpaths. This is an example of how the Scala Bazel rules allow for it (I recall pants has a repl mode for Scala too): https://github.com/bazelbuild/bazel/issues/1394

Kotlin REPL: https://kotlinlang.org/docs/command-line.html#run-the-repl

[restingbull]

Will need before impl:

• api discussion
• eval of worker requirements